Improved mounting for artificial teeth



low-

ffiw. g l' WILLIAM C. fMICI-IAELIS,-'OF NEW YORK, N.Y.

A Letters Patent No. 85,600, dated Janne/ry 5, 1869.

IMPRGVED MOUNTING- FOR ARTlIFICIAL TEETH.

To all whom it may conce/rn Beit known that I, WILLIAM C. MIcHAELIs, ofthe city, county, and State of New York, haveinvented a new and usefulImprovement in Mounting ArtificialV Teeth; and I do hereby declare thatthe .following is a full, clear, and exact description thereof, whichwill enable others skilled in the artl to make and use thesame-reference being had to the accompanying drawings, forming a part ofthis specification, in Which-l Figure 1 represents a set of te`eth towhich my improvement has been attached.

Figure 2 is the same view, showing the rubber base removed. v

Figure 3 is across-section ofthe same, takenthrough the line z x, fig.1.

Similar letters of reference'indicate corresponding parts. Y

My invention has for its object to improve the construction of lowersets of artificial teeth, so as to make them stronger and better thanwhelmounted ,in the ordinary manner, and at the same time less liable tomove when used for mastic'ating-purposes; andA It consists in loading orweighting the lower Inclars and bicuspids upon each side of the mouthwith an alloy of tin and bismuth, and in connecting the said molars andbieuspids upon the two sides ofthe mouth with a metallic wire and plate,either or both wholly or partially embedded in the hard-rubber baseI ofthe set of teeth, as hereinafter more fully described.

The teeth A are set in wax in the usual manner for an ordinary set ofrubber teeth. After the `.teeth have been properly set upon the plastercast,'the.four back teeth upon one side are removed, with the Wax inwhich they are set. One end of a wire or plate, B,'or of both a wire andplate, of any of the noble'metals, of suicient length to reach around tothe four back teeth upon the other side', is then inserted inproper`position in the wax'.

The four teeth, wax, and wire or plate B, or both a wire and plate, arethen placed in a mixture of plaster of Paris, sand, and water, to form amould.

When the mould is dry, the wax is removed and replaced with an alloy, c,oi' block-tin and bismuth.

When cold,`the plaster mould is removed and the other four back teethconnected with the other end of the wire and plate B; eitheror both, andprovided withV proceeded with in the ordinary manner, so that the saidweights c and wire and plate B, either or both', may be Wholly orpartially embedded in the rubber base D.

' The weights c may, if desired, be made entirely of tin, but l preferto use an` alloy of tin and bismuth, in the Aproportions of forty partsof tin to fifteen of bismuth, as forming a more fusible alloy, and atthe same time one that will not melt under the heat required forvulcanizing the rubber. It should be observed, however, that almost vanyalloy of ti'n and bismuth will answer the purpose. A

Having thus described my invention,

I claim as new, and desire to secure by Letters vPatent-' 1. Weightingthe rear lower teeth upon each side with metallic Weights, c,substantially in the manner herein shown and described, and for thepurpose set forth.

2. Connecting the rear teeth' upon the two sides of WM. O. MIHAELIS.Witnesses ALEX. F. ROBERTS, J AMES T. GRAHAM.

